Abstract : Thirty Marine A-4 pilots were given eight carefully designed time-sharing training sessions in a simple, generalized visual flight simulator and then compared with a control group on performance in the highly specific A4 operational flight trainer equipped with a visual display. Results indicated improved ability to detect simulated mid-air collision hazards without compromising performance in the other flight tasks. Such training therefore is recommended as an aid in reducing the mid-air collision hazard. (Author)